Pencil sharpener



FIG. 1 is an upper right front perspective view of the pencil sharpener that shows my design;

FIG. 2 is an upper left rear perspective view thereof;

FIG. 3 is a front elevational view thereof;

FIG. 4 is a right side elevational view thereof;

FIG. 5 is a rear elevational view thereof;

FIG. 6 is a left side elevational view thereof

FIG. 7 is a top plan view thereof; and,

FIG. 8 is a bottom plan view thereof. 

The ornamental design for a pencil sharpener, as shown and described. 